I think you need a kind of gate way game if your not in to the look, and maybe want to try one. I avoided Daz3D games at first, but seeing screenshots of
The Deluca Family and
Long Live the Princess made me want to...
Yeah, the problem is neither Daz3D nor Ren'py, but the devs who don't have the time/knowledge/desire to do more than average renders ; and it's worse when for those who don't even care about the quality of their renders.
It's the exact same problem than with all media. There's movies that have high quality images, for which you clearly see that the movie director past hours thinking where the camera should be put, what should be the angle and lighting. And there's those where the camera was clearly randomly placed.
And there's 3D Ren'py games where the author past hours working on each CG, and those where tons of CG where rendered in a single hour.